gasblender

GasBlender is the gas blending calculator for technical diving. It works out your Nitrox and Trimix fills step by step, with the precision blenders and tech divers expect.

Whether you are mixing a simple Nitrox 32 or a hypoxic multi-cylinder Trimix, GasBlender gives you the fill sequence bar by bar, checks the mix for safety and estimates its cost.

THREE BLENDING METHODS

• Partial pressure: empty the cylinder, then add each gas. Guaranteed result.
• Top-up: keep the gas already in the cylinder and adjust. No waste.
• Optimized: use your buffer mixes (Nitrox 40, etc.) before pure O2 to cut costs.

KEY FEATURES

• Nitrox and Trimix calculations
• Reverse mode: find the resulting mix from measured pressures
• Multi-cylinder support
• Manage your available gas sources
• Reusable mix templates
• Blending history with CSV export
• Cost estimation
• Cylinder identification by QR code
• Metric and imperial units
• Light and dark themes

SAFETY FIRST GasBlender shows real-time warnings on the critical parameters: partial pressure of oxygen (PPO2), maximum operating depth (MOD) and equivalent narcotic depth (END), so you can confirm a mix stays within your limits before filling.

PRIVACY AND OFFLINE Fully functional offline. No sign-up, no data sent without your consent. Optional sync with your own server is available.

FREE AND OPEN SOURCE GasBlender is free software (AGPL-3.0 license). The code is open and auditable.

DISCLAIMER GasBlender is a calculation aid. It does not replace blender training or analysis of the final mix with a calibrated analyzer. Always analyze your gas before diving.